Obviously nothing about that engine is stock but it does show there's nothing wrong about the basic short block, bore stroke and rod ratio. Put a great top end on it and gonna get decent results even without adding stroke, and no reason to an extent that a 383 or even a 361 couldn't do well. And by well I mean the more average power people build for 400-600+hp not a 1000 + hp, 1.61 lbs-ft and 2.44 hp per cid.